Current Transformers

The NetMeter-3P requires current transformers (CTs) to detect the load current.
CTs are chosen for your application based on:

The current rating of the circuit to be monitored

The physical size of the conductor or bus bar that each CT will be attached to

Ease of installation: "split core" CTs allow for installation without having to physically disconnect

CTs are available from Z3 Controls and other vendors.

The NetMeter typically uses split core CT's that include a burden resistor and output 0.333VAC at rated output (this is one of the most popular CT types).

Current mode CTs (unburdened CTs) must be used with an appropriately sized burden resistor in order to be used with the NetMeter. Without the proper burden resistor, current mode CTs will damage the NetMeter. Current mode CTs produce dangerous voltages when unburdened.

This is a list of popular CT types available from Z3 Controls (call for other options as required):